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Schedule of Issued Capital (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of classes of share capital [line items] |  |
Beginning balance, shares | 13,304,425 | 13,459,593
Share repurchase | (130,395) | (155,168)
Settlement of Executive PSUs, shares | (14,083) |
Share options exercised, shares | 120,595 |
Ending balance, shares | 13,558,525 | 13,304,425
Beginning balance | $ 2,281,444 | $ 2,285,738
Share repurchase | (10,010) | (4,294)
Share options exercised | 14,016 |
Ending balance | $ 2,299,533 | $ 2,281,444
Performance Share Units (PSUs) [Member] |  |
Disclosure of classes of share capital [line items] |  |
Settlement of Executive PSUs, shares | 263,900 |
Settlement of Executive PSUs | $ 14,083 |

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